一、创建新工程

下一步

二、在这个项目New Module 添加EurekaServer 子项目

有的时候start.spring.io会超时建不了，可以等一会或者手动建，用阿里url效果最佳 https://start.aliyun.com/
网上方法
初始化成大概这样

3、application.properties，这里我替换成application.yml


server:
  port: 8761
eureka:
  instance:
    hostname: localhost
  client:
    fetch-registry: false 
    register-with-eureka: false 
    service-url:
      
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

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4、加了controller

@RestController
public class indexController {
	@GetMapping("/")
	public String index() {
		return "index";
	}
}

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5/输入http://localhost:8761/，它可能没识别到访问Eureka控制台,本来要进入访问Eureka控制台的

修改一下，把IndexController全部注释掉
启动类加上注解@EnableEurekaServer
这样就能进入这样的界面
服务正常启动

然后还需要生产者、消费者

三、建生产者module

按照同样的创建时需要勾选 Spring Cloud Discover–> Eureka Discover Client 和 Spring Web 的依赖。

启动类

@SpringBootApplication
@EnableEurekaClient
@RestController
public class EurekaClientApplication {

	public static void main(String[] args) {
		SpringApplication.run(EurekaClientApplication.class, args);
	}

	@RequestMapping("sayHello")
	public String sayHello(String param) {
		return "Hello " + param;
	}
}

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application.yml

server:
  port: 8765

spring:
  application:
    name: eureka-client

eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka

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刷新后

四、消费者

按照同样的创建时需要勾选 Spring Cloud Discover–> Eureka Discover Client 和 Spring Web 的依赖。

启动类

package com.example.eureka_consumer;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

/**
 * 在启动类中添加@EnableDiscoveryClient表明标注类是消费者，加入restTemplate来消费相关的服务
 */
@SpringBootApplication
@EnableDiscoveryClient
public class EurekaConsumerApplication {

	public static void main(String[] args) {
		SpringApplication.run(EurekaConsumerApplication.class, args);
	}

	@Bean
	@LoadBalanced
	RestTemplate restTemplate() {
		return new RestTemplate();
	}

}

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controller

package com.example.eureka_consumer.controller;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.bind.annotation.RestController;


/**
 * @author samxie
 * @version 1.0
 * @date 2022-2-13 14:28
 */
@RestController
@Slf4j
public class DemoController {
	@Autowired
	RestTemplate restTemplate;

	@RequestMapping("/greet")
	public String sayHello(@RequestParam String name) {
		return restTemplate.getForObject("http://EUREKA-CLIENT/sayHello?param=" + name, String.class);
	}

}

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配置文件application.yml

server:
  port: 8763

spring:
  application:
    name: eureka-consumer

eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka